NExus 6 - Recover lost data

ok guys
silly man...I wanted to try android 6....did any backup...nothing...

I follow the instructions to installa adroid 6 and before the first reboot I "format" from recovery everything.....
I losto all datas in SD integrated...
I avoided to reboot the phone to complete the OS installation hoping to let me some 1 possibilities to recover something.

I can see the phone on my PC through recovery but the card is not seen exactly like a usb driver so I tried to use a software like "Recuva" but it's not able to see the phone card...

hope to have explained...any idea to help me?
Thanks

Ciao